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Answer to Question #1358 in Mechanics | Relativity for Jon ALlen

Question #1358
Two balls, each with a mass of 0.764 kg,
exert a gravitational force of 9.00 × 10−11 N
on each other.
How far apart are the balls? The value
of the universal gravitational constant is
6.673 × 10−11 Nm2/kg2.
Answer in units of m.
Expert's answer
According the law of gravitation attraction:
F = G M1M2/R2
R = √(GM1M2 / F) = √(6.673 × 10−11 * 0.7642/9.00 × 10−11) = 0.66 m

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